Improvement in rotary pumps



3 Sheets--Sheet 1.

s. GRINDL. Rotary Pumps.

Patented 1u|yl4,1874.

3 Sheets-Sheet 2.

G. ILRIEINDL.Y

, Rotary Pumps.

atefnted July 14, V874.

3Sheets--Sheet 3. G. GREI N D L.

Rotary Pumps. VN0,l52,QO1., atentedluly14, 1874.

FIG. l0.

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' www THE GRAPHIC CQPHTB-LITH914I PARK PLACEMLY.

UNITED STATES PATENT i OFFICE.

GUSTAVE GREINDL, OF BRUSSELS, KINGDOM OF BELGIUM.

IMPROVEMENT IN ROTARY PUMPS.

Specification forming part of Letters Patent No. 152,904, dated July 14, 1874; application filed May 12, 1874.

To all Iwhom fit may concern Be it known that I, Baron GUsTAvE GREINDL, of Brussels, in the Kingdom of Belgium, have invented a Rotary Machine for Pumping and other purposes, of which the following is a specification: p The main object of my invention is to pro duce a cheap and efficient rotary machine for pumping and other purposes, capable of being readily fixed and of working with little friction, by the combination and arrangement, within a box or casing, A, of two rotating drums or cylinders, b c, connected or geared together so that wings or blades d d carried by the one drum or cylinder b, alternately enter a channel or recess, e, formed in the other cylinder, c, the latter cylinder being partially surrounded by a stop-partition, f, a recessed part, (or parts,) f, of which can be put in communication with the outlet, as shown in the sectional elevation, Fig. 1, of the accompanying drawings. The apparatus is illustrated more in detail in the vertical section, Fig. 2, (taken at right angles to Fig. 1,) in the sectional views of the enlargements Figs. 3 and 4, (taken respectively in lines 1 2 and 3 4 of Fig. 1,) in the sectional views of the sectionFigs. 5 and 6, (taken respectively in the lines 5 6 and 7 8`of Fig. 1,) and in the elevations Figs. 7 and 8.

The sections of the escape and suction indicated in the drawings are respectively equivalent.

A box or casing, A, is closed by a cover, a, and provided with a iianged inlet, g, and with a similarly flanged outlet, The box or casing and its cover form the body of the machine, andare traversed by two steel shafts or axles, i and 7c,turning with slight friction in stufiingboxes (of gun-metal or bronze) in the cover a and standard B, bolted to a foundation-plate, 0,as shown. On the shaft or axlez' is keyed a rotating drum or cylinder, b, fitting truly within the body of the machine and carrying, dia metrically opposed to each other, two wings or blades, d d', each having a surface equal to the sectional area of the. annu lar space between the box or casing A and the drum or cylinder b. The wings d d are grooved and packed to prevent passage of liquid between their edges and the body, and

to compensate for any wear which may arise from working with sandy or gritty water. On the shaft or axle 7c is fixed another drum or cylinder, c, which turns, without end play, within the body, and at its periphery touches the periphery of the drum or cylinder b. The shafts or axles i and k carry outside the body or casing two toothed wheels, l m, whose relation to each other is as two is to one, so that in turning the two wings of the cylinder b alternately enter an epicycloidal channel or recess, e, formed in the cylinder c, as shown. A stop-partition,f, in the upper part of the interior of the body prevents direct communication between the inlet and exit passages. This partition is recessed at f l, over the whole length of the drum or cylinderc, in a position to counteract the pressure against the exposed part of said drum or cylinder c" of the column of duid to be forced out.v This recess can be put in communication with the outlet la by the passage o, which can be regulated by a cock or escrew valve, p. Above and laterally the fluidV enters the body of the machine by the enlargements q, and is forced back by the enlargements r, so that there is neither com pression on the side of the forcing-back pipe, nor vacuum caused to the suction-pipe when the wing leaves the channel or recess of the upper cylinder c. This cylinder is contained in a part, s, bored and lined with gun metal, in which it turns, so that it only allows the wings or blades cl d to pass.

The machine is provided with inlet and outlet cocks.

When using the machine as a pump, on setting it in action, water or liquid is drawn into the body at a comparatively slow speed by the wings d d', which by alternately entering the recess ofthe upper cylinder force the liquid to rise continuously, and without any sensible change of velocity, into the outlet and delivery main.

The liquid entering the channel f and controlled by the stop-partition f counterbalances the back pressure in the outlet, so that the upper cylinder is kept in equilibrium.

In order to avoid any prejudicial compression, when there is a passage of liquid between X and Y, during the movement of the wing in the recess of the cylinder c, the said recess can be furnished with a valve, W, opening from below upward, as shown in Fig. 9. The liquid, by pressure in the space X, will force the valve open so as to gain a free passage into the interior ot the cylinder c, whence it will escape by the opening Z made in the opposite part of the cavity. rlhis valve is only absolutely necessary for pumps of large volume.

For pumps of large size, and for those intended to lift water to a considerable height, in order to avoid too great a strain 011 the lower shaft or axle the two sides carry in the interior a cylindrical part, t t', of a diameter a little greater than the cylinder b, and of a breadth about half that ofthe case. The contact of the upper cylinder takes place 011 the concave section formed on the two cylindrical parts. The wings are xed on the cylinder I) and bear on the whole of their peripheries. Contact, therefore, takes place over the whole concave surface of the two cylindrical parts in contact with the upper cylinder, and the escapes are rendered'less sensible. In addition to this advantage the size of the apparatus is reduced, there being' a saving in the casting of the case and of the cover of the spaces to receive the packing, and the diameter of the lower shaft can be considerably reduced.

In order to simplify the construction of the machine, and to give greater duration to its working, I, in some cases, construct it with the modified form of wing or blade d d and recess e, shown to an enlarged scale in the theoretical diagram, Fig. 10.

In this arrangement the cylinder c, by revolving at twice the speed of the cylinder b, describes at the point y an epicycloid, x y e', serving as a normal line to the two epicycloids m y z y. Owing to the difference between these latter curves and the strokes of the wing there can never be any pressure of fluid in the course or travel ot' the machine.

The same end is accomplished by the inclination of the sides of the recess c, as shown. rlhe extremity t of the wing d describes the epicycloid c t u, normal of the curves u t and c' t, and the space between these and the sides e t and tf, of the recess e, permits free escape of the liquid without pressure.

Moreover, it will be evident that, as soon as the cylinder c leaves the periphery of the cylinder b at the point f, contact of the cylindrical part of the wing will take place with the cylindrical part ofthe bottom of the recess at t, and this surface of the win g at t will onlyr leave it at the moment the point c of the cylinder c renews its contact with the periphery of the cylinder bf It follows, therefore, that communication between the escape and feed can take place in no other manner.

It will be evident that by slightly modifying the construction of the apparatus it may be employed with acolumn of water, or as an air vor exhaust-pump, or a compressor ot' gases, as a steam or water engine, as a hydraulic propeller for vessels, o as a fluidmeter.

I claim as my invention- 1. In combination with the box or casing A and drum or cylinder c the stop-partition f, recessed at j" and communicating with the outlet h by the passage 0, regulated by a cock or valve, p, all as herein set forth and described, for the purpose specified.

2. The recess @,-formed as described, with openings into the lhollow cylinder c, and provided with a valve, W, as herein shown and set forth, for the purposes specified.

3. The wings or blades df, and recess c, having the peculiar forms shown in and described with reference to Fig. l0, for the purposesy specified.

BON- GUSTAVE GREINDL.

lVitn esses: Y

J ULEs GHEFNAY, C. MORENEY. 

